I had previously owned the Yocan Uni which I had for quite some time. I was happy with it but eventually it became inconsistent whether it would work or not so I looked for a replacement. I decided to try the newer version, the Yocan Uni Pro. I am even happier with this than I was with the original.
On the Uni Pro you can adjust the voltage by 0.1V between 2.0V and 4.2V. You can precisely fine tune your vaping experience by adjusting the voltage to best suit your needs. The Uni only has 3 preset voltage settings in comparison.
I also like the new material it appears to be made of. I chose black but many color choices. The displays when you use it are a nice feature and much better as well.
Before buying the puffco I looked into the design flaws first, and got an idea of what after market parts to expect failure and will need repair/ Maintenance. shortly after unboxing on my fourth use (blue setting) the coil cracked in half and so did the lid. My advice is to be prepared to spend out of pocket for tools and for atomizer parts, buy extra coils or an atomizer repair kit. Will be ordering The TI RCA from 3grams. The ceramic breaks too easily especially if ur trying to twist off a sticky atomizer cold.